Controlled laboratory studies of human simple reaction time generally find a practical floor around 150-180 milliseconds for visual stimuli, set by the minimum time needed for signal transduction, neural conduction, and motor response — occasional individual trials as low as about 100 ms have been recorded, but times below roughly 100 ms are treated by researchers as anticipatory false starts rather than a true reaction.
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Controlled laboratory studies of human simple reaction time generally find a practical floor around 150-180 milliseconds for visual stimuli, set by the minimum time needed for signal transduction, neural conduction, and motor response — occasional individual trials as low as about 100 ms have been recorded, but times below roughly 100 ms are treated by researchers as anticipatory false starts rather than a true reaction.
The shortest reliably measured simple reaction time (button press response to an unpredictable visual stimulus) recorded in controlled laboratory conditions for a healthy adult, as an outlier within the broader distribution of documented human reaction times.
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Limits Registry. LR-FASTEST-HUMAN-REFLEX-REACTION-TIME. Fastest scientifically measured human simple visual reaction time. 2026.